Materials Literature
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The effects of alloying elements (Cu-Ni, Mo, and Ti) in line pipe steels on the susceptibility to sulfide stress cracking (SSC) was studied with respect to hydrogen permeation, crack nucleation, and crack propagation. The SSC susceptibility was evaluated using a constant elongation rate test (CERT) method in a NACE St…
Hydrophilic and chemically reactive porous media were prepared by adsorbing functional polymers at the surface of sintered polyethylene membranes. Modification of the membrane was accomplished by first exposing the membrane to an oxygen glow discharge gas plasma to introduce an electrostatic charge at the membrane sur…
Abstract Supported molybdena catalysts, with TiO 2 , CeO 2 and Al 2 O 3 supports, were studied by XPS and ISS. It was found that reliable results are obtained only when samples are calcined and transferred into the ultrahigh vacuum system without further contact with the ambient atmosphere (‘ in situ calcination’). Th…
Abstract This paper discusses how detailed studies on flammability at elevated pressures and temperatures can be applied to liquid‐phase oxidation of cyclohexane using air/oxygen and lead to an inherently safer process with better productivity. Flammability tests of cyclohexane/oxygen vapor and vapor bubbles under act…
We measured the angles produced in the Plateau border region of ‘dry’ soap films. In a simple experimental geometry, we demonstrated that a negative line tension can be attributed to these regions. This result has important consequences for the theoretical description of foams approaching the dry limit.
Abstract Summary: The crystallization behavior of a poly(butylene succinate)‐based ionomer (PBSi) was analyzed by morphological observations and synchrotron small‐angle X‐ray scattering (SAXS) experiments. The spherulitic morphology of PBSi is composed of irregular lamellae propagating outwards from the center with io…
Abstract Summary: A novel glyco‐peptide dendrimer‐type AIDS vaccine model with a well‐defined structure was synthesized. A low‐substituted, monodispersed, glyco‐peptide dendrimer was prepared by binding maltose to a proline‐poly(lysine) dendrimer with monofunctional prolyl amino groups on the periphery. To the hemisph…
Silver, palladium, and their alloys are frequently used as electrode materials for BaTiO 3 (BT) based dielectrics. However, the electrodes and dielectrics usually are cofired at high temperatures, and silver and palladium can dissolve into the BT during cofiring. In the present study, the solubility of silver and pall…
Making measurements of electron emission properties of insulators is difficult since insulators can charge either negatively or positively under charge particle bombardment. In addition, high incident energies or high fluences can result in modification of a material’s conductivity, bulk and surface charge profile, st…
Abstract Stainless steels have a great variety of potential applications in the petroleum industry, mainly as an alternative to carbon steel in corrosive environments. Within a number of media that can cause corrosion problems with these materials, only chloride solutions and hydrogen sulfide are of importance in oilf…
When a textile material absorbs a liquid, its color appears deeper than that when it is dry because of the difference in reflectance. The difference in the diffuse reflection between the air and the liquid leads to a difference in color depth between the dry and wet conditions. Using this observation, it is possible t…
The first part of this work deals with the effect of ageing (artificial weathering) on an intumescent flame-retarded ammonium polyphosphate (APP)/polyamide-6 (PA-6)/polypropylene (PP) blend. The study of the fire properties using the cone calorimeter shows a decrease in the performance caused by the artificial weather…
Abstract The oxidative addition of bis(dibenzylideneacetone)platinum(0) to meso ‐bromo‐5,15‐diarylporphyrins in the presence of PPh 3 has been shown to be an effective way of synthesising η 1 ‐organoplatinum porphyrins in high yields. This methodology has been extended to synthesise various palladio‐ and platinioporph…
Abstract Method of polyolefin surface activation via covalent grafting of polyperoxide nanolayer by free radical mechanism has been presented. The features of such the nanolayer formation under the thermoprocessing conditions, i.e.: formation of 3D crosslinked network in polyperoxide bulk; and its grafting with comple…
We report on the optical and structural properties of a series of ZnO1−xSx films deposited by radio-frequency sputtering on float glass and sapphire substrates. In the range 0 < x < 0.4 we find that the films have wurtzite symmetry and the lattice constant varies linearly on the composition as confirmed by photoelectr…
Abstract Summary: Poly(ethylene glycol) (PEG) networks were synthesized by γ‐irradiation. The crystalline behavior of PEG was investigated by differential scanning calorimetry (DSC) and wide‐angle X‐ray diffraction (WAXD). It was shown that the crystallinity of PEG is dramatically lower in the cross‐linked networks th…
The transformation of the director configuration upon changing boundary conditions from planar to homeotropic for bipolar nematic droplets dispersed in a polymeric matrix was studied. The characteristic textural patterns are presented for droplets with different concentrations of homeotropic surfactants, and their ori…
Power capacitors (PC) may be impaired by the presence of harmonic components. An adequate evaluation of the degradation process imposed by harmonics on a PC should take into account the long-term mechanisms of degradation of PC and the possible additional stresses imposed by the harmonics. This paper presents the degr…
Abstract The dynamic rheological properties of uncured dispersions of silica in liquid polyisoprene are measured and are used to assess filler-filler networking. An increase in the dynamic storage modulus ( G ′) is observed with decreasing polyisoprene molecular weight and with increasing silica concentration. For suf…
The effect of plasma fluorination on the band gap, 2p core-level energy, and the dielectric behavior of porous silicon (PS) prepared under constant conditions has been examined using Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, photoluminescence, and reflection. It has been found that wit…